Search  for anything...
O'Neal

O'Neal Sierra Helmet

    • Based on 217 reviews
Condition: New
Checking for product changes
$143.99 Why this price?
Save $16.00 was $159.99

Buy Now, Pay Later

As low as $24.00 / mo
  • – 6-month term
  • – No impact on credit
  • – Instant approval decision
  • – Secure and straightforward checkout

Ready to go? Add this product to your cart and select a plan during checkout. Payment plans are offered through our trusted finance partners Klarna, PayTomorrow, Affirm, Apple Pay, and PayPal. No-credit-needed leasing options through Acima may also be available at checkout.

Learn more about financing & leasing here.

Selected Option

Free shipping on this product

Eligible for Return, Refund or Replacement within 30 days of receipt

To qualify for a full refund, items must be returned in their original, unused condition. If an item is returned in a used, damaged, or materially different state, you may be granted a partial refund.

To initiate a return, please visit our Returns Center.

View our full returns policy here.

Availability: In Stock.
Fulfilled by Motor Psycho Sport
Arrives May 26 – May 27
Order within 11 hours and 19 minutes
Available payment plans shown during checkout

Recently Viewed

Color: Flat White


Size: Large


Features

  • Shell is constructed with ABS
  • Weight: 1590G ( 50G)
  • Moisture wicking, removable/washable air channeled comfort liner
  • Integrated face shield
  • Meets Standards: DOT, ECE 22-05 safety standards

Color: Flat White


Brand: O'Neal


Vehicle Service Type: street-cruiser-motorcycles, ATV, street-touring-motorcycles, off-road-motorcycles, PWC


Item Weight: 3.5 Pounds


Material: Polycarbonate (PC)


Item Package Dimensions L x W x H: ‎15.8 x 12.5 x 10.6 inches


Package Weight: ‎2.34 Kilograms


Item Dimensions LxWxH: ‎16 x 1 x 12 inches


Item Weight: ‎3.5 Pounds


Brand Name: ‎O'Neal


Warranty Description: ‎See Manufacturer


Model Name: ‎Sierra II


Color: ‎Flat White


Material: ‎Polycarbonate (PC)


Suggested Users: ‎unisex-adult


Number of Items: ‎1


Manufacturer: ‎O'Neal


Part Number: ‎0817-514


Model Year: ‎2020


Style: ‎Full-face-helmet-style


Included Components: ‎helmet


Outer Material: ‎ABS


Size: ‎Large


Sport Type: ‎Motorcycling


Date First Available: July 14, 2017


Frequently asked questions

If you place your order now, the estimated arrival date for this product is: May 26 – May 27

Yes, absolutely! You may return this product for a full refund within 30 days of receiving it.

To initiate a return, please visit our Returns Center.

View our full returns policy here.

  • Klarna Financing
  • Affirm Pay in 4
  • Affirm Financing
  • PayTomorrow Financing
  • Apple Pay Later
Leasing options through Acima may also be available during checkout.

Learn more about financing & leasing here.

Similar Products

Top Amazon Reviews

    • Great value and great product
Color: Flat Black Size: X-Large
I don’t have anything bad to say about this helmet. I read some other reviews about sizing. Just make sure that you buy one size bigger than what you normally wear. I followed that advice and the helmet fits great. The helmet fits snug without feeling like the padding is scrunching your face. The helmet is super light weight and it has a sleek design just like the pictures. I saw some reviews where the built in tinted shades were difficult to function. They were not, the slider that brings them over your eyes works great and provides great protection from the sun. Best helmet I’ve ever owned for this value. ... show more
Reviewed in the United States on May 14, 2022 by Stephen
    • Great protection
Color: Flat Black Size: X-Large
Is really ergonomically design. The shades are a plus. Light weight and beautiful craftsmanship.
Reviewed in the United States on September 27, 2023 by Roberto O.
    • Snug for getting size up 1.
Color: Flat Black Size: X-Large
I got an XL and it snug, my hat size is 7 5/8" and my cheeks get oressed pretty hard with or without a balaclava. I put a stretcher in to relieve some of the pressure and it helped some. I like the sun visor, it was an unexpected surprise that i didnt realize before ordering. The lens is really the main feature I was drawn to so I didn't have to wear goggles too. But the lens fogs up as soon as I start breathing heavier in rough terrain or out the kid down when its warm. I'll be getting some anti-fog sokuti9n to see if it helps. Otherwise the Helmet is great, it's soft and comfortable inside and the mouthpc works as an adjustable vent, but still doesn't dear out the fog. Over all I give it 4 out of 6, keeping it a ½ size to smalll is my choice. In hindsight, I'd have gotten an XXL but I'm good with this XL ... show more
Reviewed in the United States on November 20, 2022 by D. Welch
    • Trend setting helmet
Color: Flat Black Size: X-Large
Excellent helmet, fit was snug at first yet, needed after some period of break in, it fits great. After regular use it is fitting better. Same with sunshine shield ; as the more I used it the easier it became to bring it down. The helmet keeps the noisey wind out and can hear my music on my ear phones off my IPhone, I get a lot of compliments on the look of the helmet, and I think it is starting a trend; more bikers are wearing these type helmets. It’s tuff, dropped it a few times, minor scratches. Tinted visor after a few uses able to bring it down easy. Clear shield comes in handy on the freeway. Only draw back is the triangle removable chin plate always come loose yet a little black duct tape has solved that issue. ... show more
Reviewed in the United States on May 14, 2021 by Papa Bear
    • Great helmet
Color: Flat Black Size: X-Large
Always wanted an dirt bike helmet and a motorcycle helmet combined.
Reviewed in the United States on January 3, 2024 by Amazon Customer
    • Awesome Helmet
Color: Flat Black Size: X-Large
Bought for my Honda XR150L. Great helmet. Much cheaper than the shop. Very happy with purchase.
Reviewed in the United States on September 1, 2023 by Jason Kelley
    • Honest uncut review
Color: Flat Black Size: X-Large
IL start by saying it's a nice quality helmet, it's comfortable, I did have to go a size larger and still have a snug fit so deffinitly recommend sizing up. It's very light weight has nice vision and tinted shades are easy to drop. Now the bad- More wind noise than I've ever experienced, it's worse than riding without a helmet to the point where you get a headache after riding longer than an hour. No adjustable air vents- the only adjustment is the mouthpiece which im pretty convinced has little to no impact. It does ventilate nicely. Visor is not removable. Yes you can physically take it off but then your clear windscreen does not properly lock open. The visor catches so much wind your constantly fighting to keep your head straight anything over 40mph. It's gotten to the point where I'm leaning my head forward just to catch a bit of a break. Overall it's not a bad helmet for the price, I'd say if your moreso riding on road then I'd keep looking as it has more disadvantages on road than not. It is a nice crossover helmet and I'd absolutely love it if it had adjustable air vents and a removable visor that still allowed me to use clear glass. Then this would be my favorite helmet. ... show more
Reviewed in the United States on May 23, 2023 by Joe W.
    • Nice helmet. Fits well.
Color: Flat Black Size: X-Large
Fits well. Nice helmet.
Reviewed in the United States on October 20, 2023 by Jason

Can't find a product?

Find it on Amazon first, then paste the link below.